<template>
	<view class="">
		<view class="search-box">
			<uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
		</view>

		<!-- 搜索结果列表 -->
		<view class="sugg-list" v-if="searchResults.length !==0">
			<view class="sugg-item" v-for="(item,index) in searchResults" :key="index"
				@click="gotoDetail(item.goods_id)">
				<view class="goods-name">
					{{ item.goods_name }}
				</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>

		<!-- 搜索历史 -->
		<view class="history-box" v-else>
			<!-- 标题区域 -->
			<view class="history-title">
				<text>搜索历史</text>
				<view v-if="!isShowClear">
					<uni-icons type="trash" size="17" @click="isShowClear = true"></uni-icons>
				</view>

				<view v-else>
					<text class="txt" @click="onClearAll">全部删除</text>
					<text class="txt" @click="isShowClear = false">取消</text>
				</view>
			</view>
			<!-- 列表区域 -->
			<view class="history-list">
				<block v-for="(item,index) in historyList" :key="index">
					<view class="history-item" @click="onHistoryItemClick(item,index)">
						<text class="history-txt" @click="gotoGoodsList(item)">{{ item }}</text>
					</view>
				</block>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				// 定时器 timeId
				timer: null,
				kw: '', //搜索关键字
				searchResults: [], //搜索结果
				isShowClear: false,
				// 搜索关键词的历史纪录
				historyList: []
			};
		},
		// 计算属性
		computed: {
			history() {
				// 反转数组
				return [...this.historyList].reverse()
			}
		},
		onLoad() {
			this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
		},
		methods: {
			input(e) {
				// 清除延时器，并把timerId 赋值给 this.timer
				clearTimeout(this.timer)
				// 重新启动一个延时器，并把timeID 赋值给 this.timer
				this.timer = setTimeout(() => {
					this.kw = e
					// console.log(this.kw);
					this.getSearchList()
				}, 500)
			},
			async getSearchList() {
				// 判断关键词是否为空
				if (this.kw === '') {
					this.searchResults = []
					return
				}
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/goods/qsearch', {
					query: this.kw
				})
				if (res.meta.status !== 200) return uni.$showMsg()
				console.log(res);
				this.searchResults = res.message
				// 查询到搜索结构之后，保存保存搜索关键词
				this.seaveSearchHistory()
			},
			// 点击搜索结果跳转商品详情
			gotoDetail(goods_id) {
				uni.navigateTo({
					url: `/subpkg/goods_detail/goods_detail?goods_id=${goods_id}`
				})
			},
			// 删除全部历史记录
			onClearAll() {
				uni.showModal({
					title: '提示',
					content: '是否删除历史记录',
					showCancel: true,
					success: ({
						confirm,
						camcel
					}) => {
						// 用户点击确定
						if (confirm) {
							this.historyList = []
							this.isShowClear = false
							// uni.setStorageSync('kw','[]')
							uni.removeStorageSync('kw')
						}
					}
				})
			},
			//点击历史记录删除指定记录
			onHistoryItemClick(item, index) {
				if (this.isShowClear) {
					this.historyList.splice(index, 1)
				}
			},
			// 保存搜索关键词
			seaveSearchHistory() {
				// 将 Array 数组转换成 Set 对象
				const set = new Set(this.historyList)
				//调用 Set 对应的 delete 方法，移除对应的元素
				set.delete(this.kw)
				// 调用 Set 对应的 add 方法 向 Set 添加一个元素
				set.add(this.kw)
				//将 Set 对象转换成 Array 数组
				this.historyList = Array.from(set)
				uni.setStorageSync('kw', JSON.stringify(this.historyList))
			},
			// 点击搜索历史跳转到商品列表
			gotoGoodsList(item) {
				uni.navigateTo({
					url: `/subpkg/goods_list/goods_list?query=${item}`
				})
			}
		}
	}
</script>

<style lang="scss">
	.search-box {
		position: sticky;
		top: 0;
		z-index: 999;
	}

	.sugg-list {
		padding: 0 5px;

		.sugg-item {
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1px solid #efefef;
			display: flex;
			align-items: center;
			justify-content: space-between;

			.goods-name {
				white-space: nowrap;
				overflow: hidden;
				text-overflow: ellipsis;
				margin-right: 3px;
			}
		}
	}

	.history-box {
		padding: 0 5px;

		.history-title {
			display: flex;
			justify-content: space-between;
			align-items: center;
			height: 40px;
			font-size: 13px;
			border-bottom: 1px solid #efefef;

			.txt {
				font-size: 12px;
				padding: 5px;
			}
		}

		.history-list {
			display: flex;
			flex-wrap: wrap;

			.history-item {
				box-sizing: border-box;
				display: inline-block;
				padding: 12px;
				position: relative;

				.history-txt {
					display: inline-block;
					font-size: 12px;
				}
			}
		}
	}
</style>
